Doubling spindle



11mm 28, 1936. G. KUWADA Z' DOUBLING SPINDLE Filed Aug. 22, 1984INVENTOR BY A JMW'M W WFM ATTORNEYS Patented Jan. 28, 1936 PATENT OFFICEDOUBLING SPINDLE Gompei Kuwada, Maedani-Mura, Kawabe-Gun, JapanApplication August 22, 1934, Serial No. 740,938 In Japan May 5, 1934 2Claims. (Cl. 242-462) My invention relates to a doubling spindle and itsbobbin with the object of securing the fit of spindle and bobbincircumferentially.

The reference is to be had to the accompanying drawing in which Fig. Iis an elevation of the spindle with the Vertical cross section of thebobbin.

Fig. II is the horizont-al cross section of the spindle and the bobbin.

In the drawng (I) is the spindle blade, (2) the wharve, (3) theprojections provided on the upper part of the wharve, (4) the bottomflange of the bobbin, (5) the metal ring inserted into the bottom fiangeof the bobbin, (6) the clearance space between projections (3) and thecorresponding grooves on the inside of the metal ring (5).

In above drawing the same notation indic-ates the same part. v

As shown by Fig. I, the top cylindrical portion of the spindle wharve(2) is provided with projections on its periphery while the metal ring(5) inserted into the bottom fiange has corresponding grooves withcertain clearance (6) between said projections and grooves, theseprojections fitting loosely into the grooves act as keys to cause bobbinto revolve with the spindle.

In doubling spindles heretofore the projections to turn the bobbin alongwith the spindle were provided at the top of the wharve in form ofupwardly projecting horns, and the bobbin was lined with metal piecesgrooved to fit over the said horns, both radial to centre. When by usagethese horns wear by being frequently brought into contact with the metalgrooves of bobbins the corners of the horns are either broken or roundedover, consequently the bobbin grooves slip over the wharve horns andbobbins are given jarring motion up and down.

Such a motion is greatly detrimental to the proper process of doublingyarns. Moreover such wear as before described is much more rapid thanthe wear on other parts of the spindle, that and the spindle frequentlyneeds to be replaced merely because of the wear on the upwardlyprojecting horns.

In my invention the projections (3)V on the wharve as well as thecorresponding grooves on the metal ring of the bobbinbeingcircumferential and their sides Vertical along with the centre ofspindle and bobbin, though certain wear may occur in either there is notcaused any jarring motion up and down to the bobbin. The clearance (6)between the projections on the wharve and the corresponding grooves oninside of the ring (5) allows bobbin to be placed over the spindles withease of manipulation.

I-Iaving thus described the principle of my invention what I claim is:-

1. In a doubling spindle, a spindle wharve having a cylindrical topportion, the outer periphery of said top portion having projectionsformed with Vertical sides, a bobbin having a recessed base portionfitting over said top portion, and a ring fitting in the recess of thebase portion, the inner periphery of said ring also having projectionsformed with Vertical sides whereby grooves are formed in the innerperiphery of said ring between the projections thereon, the projectionson the periphery of the top portion of the wharve and the projections onthe inner periphery of the ring fitting respectively into the groovesformed between the projections on the ring and the projections on thewharve, the spaces between the projections on the wharve and theprojections on the ring being greater circumferentially than thecircumferential dimension of the projections on the ring and wharverespectively, Whereby the wharve and bobbin may have a limitedcircumferential movement relative to one another.

2. In a doubling spindle, a spindle wharve having a cylindrical topportion, the outer periphery of the cylindrical top portion havingprojections formed with radial and Vertical sides, a bobbin having arecessed base portion fitting over said cylindrical top portion of thespindle wharve, and a wear-resisting ring fitting in the recess of thebase portion of the bobbin, said ring having grooves corresponding tothe projections on the wharve, said grooves and projections interlockingto provide a drving connection between the wharve and bobbin, saidgrooves being larger, circumferenti-ally, than the projections whereby aclearance is provided between the sides of the projection and the sidesof the grooves.

GOMPEI KUWADA.

